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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_DEFAULT_PROVIDER_H_
#define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_DEFAULT_PROVIDER_H_
#include <map>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/linked_ptr.h"
#include "base/synchronization/lock.h"
#include "chrome/browser/content_settings/content_settings_observable_provider.h"
#include "chrome/browser/prefs/pref_change_registrar.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
class PrefService;
namespace content_settings {
// Provider that provides default content settings based on
// user prefs. If no default values are set by the user we use the hard coded
// default values.
class DefaultProvider : public ObservableProvider,
public content::NotificationObserver {
public:
static void RegisterUserPrefs(PrefService* prefs);
DefaultProvider(PrefService* prefs,
bool incognito);
virtual ~DefaultProvider();
// ProviderInterface implementations.
virtual RuleIterator* GetRuleIterator(
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
bool incognito) const OVERRIDE;
virtual bool SetWebsiteSetting(
const ContentSettingsPattern& primary_pattern,
const ContentSettingsPattern& secondary_pattern,
ContentSettingsType content_type,
const ResourceIdentifier& resource_identifier,
Value* value) OVERRIDE;
virtual void ClearAllContentSettingsRules(
ContentSettingsType content_type) OVERRIDE;
virtual void ShutdownOnUIThread() OVERRIDE;
// content::NotificationObserver implementation.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
private:
// Sets the fields of |settings| based on the values in |dictionary|.
void GetSettingsFromDictionary(const base::DictionaryValue* dictionary);
// Forces the default settings to be explicitly set instead of themselves
// being CONTENT_SETTING_DEFAULT.
void ForceDefaultsToBeExplicit();
// Reads the default settings from the preferences service. If |overwrite| is
// true and the preference is missing, the local copy will be cleared as well.
void ReadDefaultSettings(bool overwrite);
void MigrateObsoleteNotificationPref();
void MigrateObsoleteGeolocationPref();
typedef linked_ptr<base::Value> ValuePtr;
typedef std::map<ContentSettingsType, ValuePtr> ValueMap;
// Copies of the pref data, so that we can read it on the IO thread.
ValueMap default_settings_;
PrefService* prefs_;
// Whether this settings map is for an Incognito session.
bool is_incognito_;
// Used around accesses to the |default_content_settings_| object to guarantee
// thread safety.
mutable base::Lock lock_;
PrefChangeRegistrar pref_change_registrar_;
// Whether we are currently updating preferences, this is used to ignore
// notifications from the preferences service that we triggered ourself.
bool updating_preferences_;
DISALLOW_COPY_AND_ASSIGN(DefaultProvider);
};
} // namespace content_settings
#endif // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_DEFAULT_PROVIDER_H_
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